The battery cap on the vertical grip is available with or without a disable switch

Disable Switch

CHOICE BETWEEN TWO TYPES OF MOUNTS

Series M900 A.R.M.S. Quick Release Mount

Series M910 Dual Thumb-Screw Mount

The two basic Vertical Grip WeaponLights are either an M900 or an M910, depending on the mount desired, The only other variables are: the choice of lamp modules (A or AB), retaining caps (RD for Disable style), and color of LEDs,